D400 Heavy-Duty Round Ductile Iron Manhole Cover with Frame

Why Choose BAOGAI? (Corporate Strength & Reliability)

In the global infrastructure market, BAOGAI provides the dual assurance of financial stability and manufacturing precision.

• The Only Listed Leader in the Industry:As the only listed company in China specializing in manhole covers (Stock Code: 08090), BAOGAI offers the highest level of corporate compliance, transparent quality control, and long-term supply security. Our listed status is your guarantee of a risk-free partnership.
• Precision In-House Mold R&D Center:We operate our own high-precision mold factory. This means the Φ600×45 specification is optimized for perfect fit and finish. Our in-house capability allows for Rapid Customization (logos, special patterns, or locking systems) with significantly shorter lead times and lower costs than traditional manufacturers.

Product Overview

The BAOGAI Φ600mm D400 Ductile Iron Circular Manhole Cap and Frame is engineered for high-performance municipal and industrial applications. With a robust 45mm frame depth and a test load capacity of 400kN (40 Tons), it is the ideal solution for kerbside channels, car parks, and industrial sites where durability and personnel safety are paramount.

Technical Specifications

MAIN PARAMETER

Key Product Benefits

• High-Load Stability (D400 Rated): Tested to 40 tonnes, this cover comfortably handles light to medium vehicular traffic, making it perfect for road verges and commercial parking areas.
• Personnel Access Safety: The large Φ600mm design provides a generous clear opening, allowing maintenance workers with equipment to enter and exit underground chambers safely and efficiently.
• Corrosion Resistance: The corrosion amount of water spray corrosion test for 90 days is only 1/40 of that of steel pipes and 1/10 of that of gray iron pipes.The service life is twice that of gray iron pipes and five times that of ordinary steel pipes.
• Good Plasticity: The elongation rate is ≥7%,similar to that of high carbon steel,while the elongation rate of gray iron material is zero.
• Good Toughness: The impact value is similar to that of medium carbon steel,which is more than 10 times that of gray iron materials.

Target Applications

• Municipal Roadways:Kerbside channels and verges (within 0.5m of the road edge).
• Industrial Sites:Factory drainage networks and loading bay perimeters.
• Commercial Infrastructure:Shopping mall car parks and hospital utility access.
• Telecommunications:Large-scale underground fiber optic chambers.
  

FAQ

Q1: How does being a listed company benefit my order?

A: It means we are subject to regular government and financial audits, ensuring we follow ethical labor practices and use only high-grade raw materials. You get a “peace of mind” guarantee that the product delivered matches the technical data sheet 100%.

Q2: Is the Φ600 measurement the “Clear Opening” or the “Frame Diameter”?

A: Φ600 is the external frame diameter. The clear opening is typically 500mm, providing a standard unobstructed access point for personnel as per international safety guidelines.

Q3: Can you emboss our city’s crest or company logo on the cover?

A: Yes. Thanks to our in-house mold factory, we can create custom-branded covers with very low lead times. We can even provide a 3D mock-up of the logo for your approval before production.